GROUP(5)

NAME
       group - user group file

DESCRIPTION
       /etc/group  is  an  ASCII file which defines the groups to
       which users belong.  There is one entry per line, and each
       line has the format:
              group_name:passwd:GID:user_list

       The field descriptions are:

       group_name
              the name of the group.

       password
              the  (encrypted)  group password.  If this field is
              empty, no password is needed.

       GID    the numerical group ID.

       user_list
              all the group member's  user  names,  separated  by
              commas.

FILES
       /etc/group

SEE ALSO
       login(1) newgrp(1) passwd(5)